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91aae0d538
mpv/libmpdemux/asfheader.c
reimar bf0b713d0c fix stream selection and -bandwidth for mms-over-http. 
Modifies header parsing to do a brute-force scan for known guids, to avoid
having to analyze and parse the whole property-tree structure.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14237 b3059339-0415-0410-9bf9-f77b7e298cf2
2004-12-25 11:31:32 +00:00

437 lines
16 KiB
C
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// .asf fileformat docs from http://divx.euro.ru
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
extern int verbose; // defined in mplayer.c
#include "config.h"
#include "mp_msg.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "asf.h"
#ifdef ARCH_X86
#define ASF_LOAD_GUID_PREFIX(guid) (*(uint32_t *)(guid))
#else
#define ASF_LOAD_GUID_PREFIX(guid) \
((guid)[3] << 24 | (guid)[2] << 16 | (guid)[1] << 8 | (guid)[0])
#endif
#define ASF_GUID_PREFIX_audio_stream 0xF8699E40
#define ASF_GUID_PREFIX_video_stream 0xBC19EFC0
#define ASF_GUID_PREFIX_audio_conceal_none 0x49f1a440
#define ASF_GUID_PREFIX_audio_conceal_interleave 0xbfc3cd50
#define ASF_GUID_PREFIX_header 0x75B22630
#define ASF_GUID_PREFIX_data_chunk 0x75b22636
#define ASF_GUID_PREFIX_index_chunk 0x33000890
#define ASF_GUID_PREFIX_stream_header 0xB7DC0791
#define ASF_GUID_PREFIX_header_2_0 0xD6E229D1
#define ASF_GUID_PREFIX_file_header 0x8CABDCA1
#define ASF_GUID_PREFIX_content_desc 0x75b22633
#define ASF_GUID_PREFIX_stream_group 0x7bf875ce
/*
const char asf_audio_stream_guid[16] = {0x40, 0x9e, 0x69, 0xf8,
0x4d, 0x5b, 0xcf, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b};
const char asf_video_stream_guid[16] = {0xc0, 0xef, 0x19, 0xbc,
0x4d, 0x5b, 0xcf, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b};
*/
const char asf_stream_header_guid[16] = {0x91, 0x07, 0xdc, 0xb7,
0xb7, 0xa9, 0xcf, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65};
const char asf_file_header_guid[16] = {0xa1, 0xdc, 0xab, 0x8c,
0x47, 0xa9, 0xcf, 0x11, 0x8e, 0xe4, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65};
const char asf_content_desc_guid[16] = {0x33, 0x26, 0xb2, 0x75,
0x8e, 0x66, 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c};
const char asf_stream_group_guid[16] = {0xce, 0x75, 0xf8, 0x7b,
0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2};
const char asf_data_chunk_guid[16] = {0x36, 0x26, 0xb2, 0x75,
0x8e, 0x66, 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c};
static ASF_header_t asfh;
unsigned char* asf_packet=NULL;
int asf_scrambling_h=1;
int asf_scrambling_w=1;
int asf_scrambling_b=1;
int asf_packetsize=0;
double asf_packetrate=0;
int asf_movielength=0;
//int i;
// the variable string is modify in this function
void pack_asf_string(char* string, int length) {
int i,j;
if( string==NULL ) return;
for( i=0, j=0; i<length && string[i]!='\0'; i+=2, j++) {
string[j]=string[i];
}
string[j]='\0';
}
// the variable string is modify in this function
void print_asf_string(const char* name, char* string, int length) {
pack_asf_string(string, length);
mp_msg(MSGT_HEADER,MSGL_V,"%s%s\n", name, string);
}
static char* asf_chunk_type(unsigned char* guid) {
static char tmp[60];
char *p;
int i;
switch(ASF_LOAD_GUID_PREFIX(guid)){
case ASF_GUID_PREFIX_audio_stream:
return "guid_audio_stream";
case ASF_GUID_PREFIX_video_stream:
return "guid_video_stream";
case ASF_GUID_PREFIX_audio_conceal_none:
return "guid_audio_conceal_none";
case ASF_GUID_PREFIX_audio_conceal_interleave:
return "guid_audio_conceal_interleave";
case ASF_GUID_PREFIX_header:
return "guid_header";
case ASF_GUID_PREFIX_data_chunk:
return "guid_data_chunk";
case ASF_GUID_PREFIX_index_chunk:
return "guid_index_chunk";
case ASF_GUID_PREFIX_stream_header:
return "guid_stream_header";
case ASF_GUID_PREFIX_header_2_0:
return "guid_header_2_0";
case ASF_GUID_PREFIX_file_header:
return "guid_file_header";
case ASF_GUID_PREFIX_content_desc:
return "guid_content_desc";
default:
strcpy(tmp, "unknown guid ");
p = tmp + strlen(tmp);
for (i = 0; i < 16; i++) {
if ((1 << i) & ((1<<4) | (1<<6) | (1<<8))) *p++ = '-';
sprintf(p, "%02x", guid[i]);
p += 2;
}
return tmp;
}
}
int asf_check_header(demuxer_t *demuxer){
unsigned char asfhdrguid[16]={0x30,0x26,0xB2,0x75,0x8E,0x66,0xCF,0x11,0xA6,0xD9,0x00,0xAA,0x00,0x62,0xCE,0x6C};
stream_read(demuxer->stream,(char*) &asfh,sizeof(asfh)); // header obj
le2me_ASF_header_t(&asfh); // swap to machine endian
// for(i=0;i<16;i++) printf(" %02X",temp[i]);printf("\n");
// for(i=0;i<16;i++) printf(" %02X",asfhdrguid[i]);printf("\n");
if(memcmp(asfhdrguid,asfh.objh.guid,16)){
mp_msg(MSGT_HEADER,MSGL_V,"ASF_check: not ASF guid!\n");
return 0; // not ASF guid
}
if(asfh.cno>256){
mp_msg(MSGT_HEADER,MSGL_V,"ASF_check: invalid subchunks_no %d\n",(int) asfh.cno);
return 0; // invalid header???
}
return 1;
}
extern void print_wave_header(WAVEFORMATEX *h);
extern void print_video_header(BITMAPINFOHEADER *h);
int find_asf_guid(char *buf, const char *guid, int cur_pos, int buf_len)
{
int i;
for (i = cur_pos; i < buf_len - 19; i++) {
if (memcmp(&buf[i], guid, 16) == 0)
return i + 16 + 8; // point after guid + length
}
return -1;
}
int read_asf_header(demuxer_t *demuxer){
unsigned int hdr_len = asfh.objh.size - sizeof(asfh);
char *hdr = NULL;
char guid_buffer[16];
int pos, start = stream_tell(demuxer->stream);
uint32_t* streams = NULL;
int audio_streams=0;
int video_streams=0;
uint16_t stream_count=0;
int best_video = -1;
int best_audio = -1;
uint64_t data_len;
if (hdr_len > 64 * 1024) {
mp_msg(MSGT_HEADER, MSGL_FATAL,
"FATAL: header size bigger than 64 kB (%d)!\n"
"Please contact MPlayer authors, and upload/send this file.\n",
hdr_len);
return 0;
}
hdr = malloc(hdr_len);
if (!hdr) {
mp_msg(MSGT_HEADER, MSGL_FATAL, "Could not allocate %d bytes for header\n",
hdr_len);
return 0;
}
stream_read(demuxer->stream, hdr, hdr_len);
if (stream_eof(demuxer->stream)) {
mp_msg(MSGT_HEADER, MSGL_FATAL,
"EOF while reading asf header, broken/incomplete file?\n");
goto err_out;
}
// find stream headers
pos = 0;
while ((pos = find_asf_guid(hdr, asf_stream_header_guid, pos, hdr_len)) >= 0)
{
ASF_stream_header_t *streamh = (ASF_stream_header_t *)&hdr[pos];
char *buffer;
pos += sizeof(ASF_stream_header_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_stream_header_t(streamh);
mp_msg(MSGT_HEADER, MSGL_V, "stream type: %s\n",
asf_chunk_type(streamh->type));
mp_msg(MSGT_HEADER, MSGL_V, "stream concealment: %s\n",
asf_chunk_type(streamh->concealment));
mp_msg(MSGT_HEADER, MSGL_V, "type: %d bytes, stream: %d bytes ID: %d\n",
(int)streamh->type_size, (int)streamh->stream_size,
(int)streamh->stream_no);
mp_msg(MSGT_HEADER, MSGL_V, "unk1: %lX unk2: %X\n",
(unsigned long)streamh->unk1, (unsigned int)streamh->unk2);
mp_msg(MSGT_HEADER, MSGL_V, "FILEPOS=0x%X\n", pos + start);
// type-specific data:
buffer = &hdr[pos];
pos += streamh->type_size;
if (pos > hdr_len) goto len_err_out;
switch(ASF_LOAD_GUID_PREFIX(streamh->type)){
case ASF_GUID_PREFIX_audio_stream: {
sh_audio_t* sh_audio=new_sh_audio(demuxer,streamh->stream_no & 0x7F);
++audio_streams;
sh_audio->wf=calloc((streamh->type_size<sizeof(WAVEFORMATEX))?sizeof(WAVEFORMATEX):streamh->type_size,1);
memcpy(sh_audio->wf,buffer,streamh->type_size);
le2me_WAVEFORMATEX(sh_audio->wf);
if(verbose>=1) print_wave_header(sh_audio->wf);
if(ASF_LOAD_GUID_PREFIX(streamh->concealment)==ASF_GUID_PREFIX_audio_conceal_interleave){
buffer = &hdr[pos];
pos += streamh->stream_size;
if (pos > hdr_len) goto len_err_out;
asf_scrambling_h=buffer[0];
asf_scrambling_w=(buffer[2]<<8)|buffer[1];
asf_scrambling_b=(buffer[4]<<8)|buffer[3];
asf_scrambling_w/=asf_scrambling_b;
} else {
asf_scrambling_b=asf_scrambling_h=asf_scrambling_w=1;
}
mp_msg(MSGT_HEADER,MSGL_V,"ASF: audio scrambling: %d x %d x %d\n",asf_scrambling_h,asf_scrambling_w,asf_scrambling_b);
//if(demuxer->audio->id==-1) demuxer->audio->id=streamh.stream_no & 0x7F;
break;
}
case ASF_GUID_PREFIX_video_stream: {
sh_video_t* sh_video=new_sh_video(demuxer,streamh->stream_no & 0x7F);
unsigned int len=streamh->type_size-(4+4+1+2);
++video_streams;
// sh_video->bih=malloc(chunksize); memset(sh_video->bih,0,chunksize);
sh_video->bih=calloc((len<sizeof(BITMAPINFOHEADER))?sizeof(BITMAPINFOHEADER):len,1);
memcpy(sh_video->bih,&buffer[4+4+1+2],len);
le2me_BITMAPINFOHEADER(sh_video->bih);
//sh_video->fps=(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
//sh_video->frametime=(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
if(verbose>=1) print_video_header(sh_video->bih);
//asf_video_id=streamh.stream_no & 0x7F;
//if(demuxer->video->id==-1) demuxer->video->id=streamh.stream_no & 0x7F;
break;
}
}
// stream-specific data:
// stream_read(demuxer->stream,(char*) buffer,streamh.stream_size);
}
// find file header
pos = find_asf_guid(hdr, asf_file_header_guid, 0, hdr_len);
if (pos >= 0) {
ASF_file_header_t *fileh = (ASF_file_header_t *)&hdr[pos];
pos += sizeof(ASF_file_header_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_file_header_t(fileh);
mp_msg(MSGT_HEADER, MSGL_V, "ASF: packets: %d flags: %d "
"max_packet_size: %d min_packet_size: %d max_bitrate: %d "
"preroll: %d\n",
(int)fileh->num_packets, (int)fileh->flags,
(int)fileh->min_packet_size, (int)fileh->max_packet_size,
(int)fileh->max_bitrate, (int)fileh->preroll);
asf_packetsize=fileh->max_packet_size;
asf_packet=malloc(asf_packetsize); // !!!
asf_packetrate=fileh->max_bitrate/8.0/(double)asf_packetsize;
asf_movielength=fileh->send_duration/10000000LL;
}
// find content header
pos = find_asf_guid(hdr, asf_content_desc_guid, 0, hdr_len);
if (pos >= 0) {
ASF_content_description_t *contenth = (ASF_content_description_t *)&hdr[pos];
char *string=NULL;
pos += sizeof(ASF_content_description_t);
if (pos > hdr_len) goto len_err_out;
le2me_ASF_content_description_t(contenth);
mp_msg(MSGT_HEADER,MSGL_V,"\n");
// extract the title
if( contenth->title_size!=0 ) {
string = &hdr[pos];
pos += contenth->title_size;
if (pos > hdr_len) goto len_err_out;
if(verbose>0)
print_asf_string(" Title: ", string, contenth->title_size);
else
pack_asf_string(string, contenth->title_size);
demux_info_add(demuxer, "name", string);
}
// extract the author
if( contenth->author_size!=0 ) {
string = &hdr[pos];
pos += contenth->author_size;
if (pos > hdr_len) goto len_err_out;
if(verbose>0)
print_asf_string(" Author: ", string, contenth->author_size);
else
pack_asf_string(string, contenth->author_size);
demux_info_add(demuxer, "author", string);
}
// extract the copyright
if( contenth->copyright_size!=0 ) {
string = &hdr[pos];
pos += contenth->copyright_size;
if (pos > hdr_len) goto len_err_out;
if(verbose>0)
print_asf_string(" Copyright: ", string, contenth->copyright_size);
else
pack_asf_string(string, contenth->copyright_size);
demux_info_add(demuxer, "copyright", string);
}
// extract the comment
if( contenth->comment_size!=0 ) {
string = &hdr[pos];
pos += contenth->comment_size;
if (pos > hdr_len) goto len_err_out;
if(verbose>0)
print_asf_string(" Comment: ", string, contenth->comment_size);
else
pack_asf_string(string, contenth->comment_size);
demux_info_add(demuxer, "comments", string);
}
// extract the rating
if( contenth->rating_size!=0 ) {
string = &hdr[pos];
pos += contenth->rating_size;
if (pos > hdr_len) goto len_err_out;
if(verbose>0)
print_asf_string(" Rating: ", string, contenth->rating_size);
}
mp_msg(MSGT_HEADER,MSGL_V,"\n");
}
// find content header
pos = find_asf_guid(hdr, asf_stream_group_guid, 0, hdr_len);
if (pos >= 0) {
uint16_t stream_id, i;
uint32_t max_bitrate;
char *ptr = &hdr[pos];
mp_msg(MSGT_HEADER,MSGL_V,"============ ASF Stream group == START ===\n");
stream_count = le2me_16(*(uint16_t*)ptr);
ptr += sizeof(uint16_t);
if (ptr > &hdr[hdr_len]) goto len_err_out;
if(stream_count > 0)
streams = (uint32_t*)malloc(2*stream_count*sizeof(uint32_t));
mp_msg(MSGT_HEADER,MSGL_V," stream count=[0x%x][%u]\n", stream_count, stream_count );
for( i=0 ; i<stream_count ; i++ ) {
stream_id = le2me_16(*(uint16_t*)ptr);
ptr += sizeof(uint16_t);
if (ptr > &hdr[hdr_len]) goto len_err_out;
memcpy(&max_bitrate, ptr, sizeof(uint32_t));// workaround unaligment bug on sparc
max_bitrate = le2me_32(max_bitrate);
ptr += sizeof(uint32_t);
if (ptr > &hdr[hdr_len]) goto len_err_out;
mp_msg(MSGT_HEADER,MSGL_V," stream id=[0x%x][%u]\n", stream_id, stream_id );
mp_msg(MSGT_HEADER,MSGL_V," max bitrate=[0x%x][%u]\n", max_bitrate, max_bitrate );
streams[2*i] = stream_id;
streams[2*i+1] = max_bitrate;
}
mp_msg(MSGT_HEADER,MSGL_V,"============ ASF Stream group == END ===\n");
}
free(hdr);
hdr = NULL;
start = stream_tell(demuxer->stream); // start of first data chunk
stream_read(demuxer->stream, guid_buffer, 16);
if (memcmp(guid_buffer, asf_data_chunk_guid, 16) != 0) {
mp_msg(MSGT_HEADER, MSGL_FATAL, "No data chunk following header!\n");
return 0;
}
// read length of chunk
stream_read(demuxer->stream, (char *)&data_len, sizeof(data_len));
le2me_64(data_len);
demuxer->movi_start = stream_tell(demuxer->stream) + 26;
demuxer->movi_end = start + data_len;
mp_msg(MSGT_HEADER, MSGL_V, "Found movie at 0x%X - 0x%X\n",
(int)demuxer->movi_start, (int)demuxer->movi_end);
if(streams) {
// stream selection is done in the network code, it shouldn't be done here
// as the servers often do not care about what we requested.
#if 0
uint32_t vr = 0, ar = 0,i;
#ifdef MPLAYER_NETWORK
if( demuxer->stream->streaming_ctrl!=NULL ) {
if( demuxer->stream->streaming_ctrl->bandwidth!=0 && demuxer->stream->streaming_ctrl->data!=NULL ) {
best_audio = ((asf_http_streaming_ctrl_t*)demuxer->stream->streaming_ctrl->data)->audio_id;
best_video = ((asf_http_streaming_ctrl_t*)demuxer->stream->streaming_ctrl->data)->video_id;
}
} else
#endif
for(i = 0; i < stream_count; i++) {
uint32_t id = streams[2*i];
uint32_t rate = streams[2*i+1];
if(demuxer->v_streams[id] && rate > vr) {
vr = rate;
best_video = id;
} else if(demuxer->a_streams[id] && rate > ar) {
ar = rate;
best_audio = id;
}
}
#endif
free(streams);
streams = NULL;
}
mp_msg(MSGT_HEADER,MSGL_V,"ASF: %d audio and %d video streams found\n",audio_streams,video_streams);
if(!audio_streams) demuxer->audio->id=-2; // nosound
else if(best_audio > 0 && demuxer->audio->id == -1) demuxer->audio->id=best_audio;
if(!video_streams){
if(!audio_streams){
mp_msg(MSGT_HEADER,MSGL_ERR,"ASF: no audio or video headers found - broken file?\n");
return 0;
}
demuxer->video->id=-2; // audio-only
} else if (best_video > 0 && demuxer->video->id == -1) demuxer->video->id = best_video;
#if 0
if(verbose){
printf("ASF duration: %d\n",(int)fileh.duration);
printf("ASF start pts: %d\n",(int)fileh.start_timestamp);
printf("ASF end pts: %d\n",(int)fileh.end_timestamp);
}
#endif
return 1;
len_err_out:
mp_msg(MSGT_HEADER, MSGL_FATAL, "Invalid length in ASF header!\n");
err_out:
if (hdr) free(hdr);
if (streams) free(streams);
return 0;
}
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